package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


/*
 * 订单业务层实现
 */
@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Value("北京市海淀区上地十街10号")
    private String shopAddress;
    @Value("zOZVPQAV0hB2UiQRGcbMuHpOAVmuAo5i")
    private String ak;

    /*
     * 用户下单
     */
    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        //数据校验(地址是否存在？购物车是否为空？)
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        if (addressBookId == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            //购物车为空,无法下单
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        checkOutOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());

        //构造订单对象，将订单数据保存到订单表
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(BaseContext.getCurrentId());
        order.setStatus(Orders.TO_BE_CONFIRMED);
        order.setPayStatus(Orders.PAID);
        order.setOrderTime(LocalDateTime.now());
        orderMapper.insert(order);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //构造订单明细对象，将订单明细数据保存到订单明细表
        orderDetailMapper.insertBatch(orderDetailList);
        //清空购物车
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderTime(LocalDateTime.now())
                .orderAmount(order.getAmount())
                .build();

        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",order.getId());
        map.put("content",order.getNumber());

        //将map对象转为JSON字符串
        String json = JSON.toJSONString(map);

        //提醒商家，给商家浏览器页面推送消息
        webSocketServer.sendToAllClient(json);

        return orderSubmitVO;
    }

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//
//        return vo;
//    }

        JSONObject jsonObject = new JSONObject();
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }


    @Override
    public void paySuccess(String outTradeNo) {
        //修改订单的状态和支付状态
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间

        Orders order = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(order);
    }

    /*
     *历史订单分页查询
     *day09实战
     */
    @Override
    public PageResult userhistoryOrders(int pageNum, int pageSize, Integer status) {
        //开启分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<Orders> list = new ArrayList<>();
        //查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();//订单id
                //查询订单明细
                List<OrderDetail> orderDetailLists = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailLists);
                list.add(orderVO);

            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /*
     *查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO orderDetail(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //查询订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        //将订单及明细封装OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(id);
//
//        // 校验订单是否存在
//        if (ordersDB == null) {
//            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
//        }
//
//        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
//        if (ordersDB.getStatus() > 2) {
//            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
//        }
//
//        Orders orders = new Orders();
//        orders.setId(ordersDB.getId());
//
//        // 订单处于待接单状态下取消，需要进行退款
//        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }
//
//        // 更新订单状态、取消原因、取消时间
//        orders.setStatus(Orders.CANCELLED);
//        orders.setCancelReason("用户取消");
//        orders.setCancelTime(LocalDateTime.now());
//        orderMapper.update(orders);
//    }

        Orders order = orderMapper.getById(id);
        if (order.getStatus() == Orders.CANCELLED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        order.setStatus(Orders.CANCELLED);
        order.setCancelTime(LocalDateTime.now());
        order.setPayStatus(Orders.REFUND);
        order.setCancelReason("用户取消");
        orderMapper.update(order);
    }

    /*
     *再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据id查询订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        //将订单明细对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            //将原订单的菜品信息复制到购物车
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        //将购物车数据批量插入到购物车数据表
        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    /*
     *条件查询订单
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //分页条件查询订单
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        //部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 将共同字段和部分字段对应的对象转换成指定对象
     *
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                //将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        //将订单明细菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishStrList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber().toString();
            return orderDish;
        }).collect(Collectors.toList());

        //将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishStrList);
    }

    /*
     *各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        //根据状态，分别查询出待接单、待派送、派送中的订单总数
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据封装到OrderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

//    /**
//     * 拒单
//     *
//     * @param ordersRejectionDTO
//     */
//    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
//        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
//
//        // 订单只有存在且状态为2（待接单）才可以拒单
//        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
//        }
//
//        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }
//
//        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
//        Orders orders = new Orders();
//        orders.setId(ordersDB.getId());
//        orders.setStatus(Orders.CANCELLED);
//        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
//        orders.setCancelTime(LocalDateTime.now());
//
//        orderMapper.update(orders);
//    }

//    /**
//     * 商家取消订单
//     *
//     * @param ordersCancelDTO
//     */
//    @Override
//    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
//        //根据id获得订单
//        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
//        //支付状态
//        Integer payStatus = ordersDB.getPayStatus();
//        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
//        }
//
//        //取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
//        Orders orders = new Orders();
//        orders.setId(ordersCancelDTO.getId());
//        orders.setStatus(Orders.CANCELLED);
//        orders.setCancelReason(ordersCancelDTO.getCancelReason());
//        orders.setCancelTime(LocalDateTime.now());
//        orderMapper.update(orders);
//    }

    //拒单
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders order = orderMapper.getById(ordersRejectionDTO.getId());
        order.setStatus(Orders.CANCELLED);
        order.setCancelTime(LocalDateTime.now());
        order.setPayStatus(Orders.REFUND);
        order.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orderMapper.update(order);
    }

    // 取消订单--商家端
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders order = orderMapper.getById(ordersCancelDTO.getId());
        if (order.getStatus() == Orders.CANCELLED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        order.setStatus(Orders.CANCELLED);
        order.setCancelTime(LocalDateTime.now());
        if (order.getPayStatus() == Orders.PAID) {
            order.setPayStatus(Orders.REFUND);
        }
        order.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(order);
    }

    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在，状态是否为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    @Override
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        //校验订单是否存在，状态是否为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据订单id查询原始订单对象
        Orders orders = orderMapper.getById(id);
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+orders.getNumber());

        //通过websocket向商家浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

    /*
     * 先获取店铺位置
     * 再获取收货地址
     * 解析经纬度坐标
     * 比较两者距离是否大于五公里
     */


    /**
     * 检查客户的收货地址是否超出配送范围
     *
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 5000) {
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
